Feature: Conversation Continuity with Email (#770)

* Added POC for mail inbox reply email
* created mailbox and migratuion for the same
* cleaned up sidekiq queues and added the queues for action mailbox and active storage
* created conversation mailbox and functionlaity to create a message on the conversation when it's replied

* Added UUID to conversation to be used in email replies

* added migration to add uuid for conversation
* changed parsing and resource fetching to reflect matching uuid and
  loading conversation alone
* cleaned up conversation mailbox.rb

* Added content type & attribute for message

* Added the new reply email to outgoing emails
* Added migration to accounts for adding domain and settings
* Modified seeds to reflect this changes
* Added the flag based column on account for boolean settings
* Added the new reply to email in outgoing conversation emails based on conditions

* Added dynamic email routing in application mailbox
* Added dynamic email routing in application mailbox
* Added a catch all deafult empty mailbox
* Added annotation for account

* Added the complete email details & attachments to the message
* Added the complete email details to the message in content_attributes, like subject, to, cc, bcc etc
* Modified the mail extractor to give a serilaized version of email
* Handled storing attachments of email on the message

* Added incoming email settings, env variables

* [#138] Added documentation regarding different email settings and variables

* Fixed the mail attachments blob issue (#138)
* Decoided attachments were strings and had to construct blobs out fo them to work with active storage
* Fixed the content encoding issue with mail body
* Fixed issue with Proc used in apllication mailbox routing
* Fixed couple of typos and silly mistakes

* Set appropriate from email for conversation reply mails (#138)
* From email was taken from a env variable, changed it to take from account settings if enabled
* Set the reply to email correctly based on conversation UUID
* Added commented config ind development.rb for mailbox ingress

* Added account settings for domain and support email (#138)
* Added the new attributes in accounts controller params whitelisting, api responses
* Added options for the the new fields in account settings

* Fixed typos in email continuity docs and warnings

* Added specs for conversation reply mailer changes (#138)
* Added specs for
  * conversation reply mailer
  * Accounts controller
  * Account and Conversation models

* Added tests for email presenter (#138)

* Specs for inbound email routing and mailboxes (#138)

db/migrate/20200330115622_create_action_mailbox_tables.action_mailbox.rb

@@ -0,0 +1,14 @@
+# This migration comes from action_mailbox (originally 20180917164000)
+class CreateActionMailboxTables < ActiveRecord::Migration[6.0]
+  def change
+    create_table :action_mailbox_inbound_emails do |t|
+      t.integer :status, default: 0, null: false
+      t.string  :message_id, null: false
+      t.string  :message_checksum, null: false
+
+      t.timestamps
+
+      t.index [:message_id, :message_checksum], name: 'index_action_mailbox_inbound_emails_uniqueness', unique: true
+    end
+  end
+end

db/migrate/20200404092329_add_conversation_uuid.rb

@@ -0,0 +1,6 @@
+class AddConversationUuid < ActiveRecord::Migration[6.0]
+  def change
+    enable_extension 'pgcrypto'
+    add_column :conversations, :uuid, :uuid, default: 'gen_random_uuid()', null: false
+  end
+end

db/migrate/20200411125638_add_domain_to_accounts.rb

@@ -0,0 +1,9 @@
+class AddDomainToAccounts < ActiveRecord::Migration[6.0]
+  def change
+    change_table :accounts, bulk: true do |t|
+      t.string :domain, limit: 100
+      t.string :support_email, limit: 100
+      t.integer :settings_flags, default: 0, null: false
+    end
+  end
+end

db/schema.rb

@@ -13,6 +13,7 @@
 ActiveRecord::Schema.define(version: 2020_04_29_082655) do
 
   # These are extensions that must be enabled in order to support this database
+  enable_extension "pgcrypto"
   enable_extension "plpgsql"
 
   create_table "access_tokens", force: :cascade do |t|
@@ -42,6 +43,18 @@ ActiveRecord::Schema.define(version: 2020_04_29_082655) do
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.integer "locale", default: 0
+    t.string "domain", limit: 100
+    t.string "support_email", limit: 100
+    t.integer "settings_flags", default: 0, null: false
+  end
+
+  create_table "action_mailbox_inbound_emails", force: :cascade do |t|
+    t.integer "status", default: 0, null: false
+    t.string "message_id", null: false
+    t.string "message_checksum", null: false
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["message_id", "message_checksum"], name: "index_action_mailbox_inbound_emails_uniqueness", unique: true
   end
 
   create_table "active_storage_attachments", force: :cascade do |t|
@@ -190,6 +203,7 @@ ActiveRecord::Schema.define(version: 2020_04_29_082655) do
     t.boolean "locked", default: false
     t.jsonb "additional_attributes"
     t.bigint "contact_inbox_id"
+    t.uuid "uuid", default: -> { "gen_random_uuid()" }, null: false
     t.index ["account_id", "display_id"], name: "index_conversations_on_account_id_and_display_id", unique: true
     t.index ["account_id"], name: "index_conversations_on_account_id"
     t.index ["contact_inbox_id"], name: "index_conversations_on_contact_inbox_id"

db/seeds.rb

@@ -1,4 +1,8 @@
-account = Account.create!(name: 'Acme Inc')
+account = Account.create!(
+  name: 'Acme Inc',
+  domain: 'support.chatwoot.com',
+  from_email: ENV.fetch('MAILER_SENDER_EMAIL', 'accounts@chatwoot.com')
+)
 
 user = User.new(name: 'John', email: 'john@acme.inc', password: '123456')
 user.skip_confirmation!